Twin Sisters Mtns

The Twin Sisters Mtns is a chromium mine located in Skagit county, Washington at an elevation of 3,999 feet.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Name: Twin Sisters Mtns

State:  Washington

County:  Skagit

Elevation: 3,999 Feet (1,219 Meters)

Commodity: Chromium

Lat, Long: 48.64, -121.89833

Map: View on Google Maps

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.


Satelite image of the Twin Sisters Mtns

Twin Sisters Mtns MRDS details

Site Name

Primary: Twin Sisters Mtns


Commodity

Primary: Chromium


Location

State: Washington
County: Skagit
District: Hamilton District


Land Status

Land ownership: National Forest
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.


Holdings

Not available


Workings

Not available


Ownership

Owner Name: Twin Sisters Magnesium And Chrome Corp., Seattle, Wash.
Years: 1955 -


Production

Not available


Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S


Physiography

General Physiographic Area: Pacific Mountain System
Physiographic Province: Cascade-Sierra Mountains
Physiographic Section: Northern Cascade Mountains


Mineral Deposit Model

Model Name: Podiform chromite (minor)


Orebody

Form: PODS, BANDS, MASSIVE, DISSEMINATED


Structure

Not available


Alterations

Not available


Rocks

Not available


Analytical Data

Not available


Materials

Ore: Chromite
Gangue: Dunite
Gangue: Olivine


Comments

Comment (Workings): WORKINGS UNKNOWN

Comment (Deposit): DEVELOPMENT IN 1955, 1957. ; INFO.SRC : 1 PUB LIT

Comment (Deposit): MRDS RECORD US53003 HAS BEEN MERGED WITH THIS RECORD AND DELETED

Comment (Location): TWIN SISTERS MTNS (SE END), THREE LAKES AREA; ELEVATION IS APPROXIMATE.

Comment (Development): UNKNOWN DEVELOPMENT

Comment (Deposit): CHROMITE APPEARS AS SMALL PODS, BANDS, AND DISSEMINATED GRAINS IN DUNITE.


References

Reference (Deposit): HUNTTING, M.T., 1956, INVENTORY OF WASHINGTON MINERALS, PART II, METALLIC MINERALS: WASHINGTON DIVISION OF MINES AND GEOLOGY BULLETIN 37, V. 1, P. 40.

Reference (Deposit): WASHINGTON DIVISION OF MINES AND GEOLOGY INFORMATION CIRCULAR 24, P. 16

Reference (Deposit): WASHINGTON DIVISION OF MINES AND GEOLOGY INFORMATION CIRCULAR 27, P. 18.


Washington Gold

Where to Find Gold in Washington

"Where to Find Gold in Washington" looks at the density of modern placer mining claims along with historical gold mining locations and mining district descriptions to determine areas of high gold discovery potential in Arizona. Read more: Where to Find Gold in Washington.